Asymmetric heating of the HR 4796A dust ring due to pericenter glow

  title={Asymmetric heating of the HR 4796A dust ring due to pericenter glow},
  author={Margaret Moerchen and Laura Churcher and Charles M. Telesco and Mark C. Wyatt and Robert Scott Fisher and Christopher Packham},
  journal={Astronomy and Astrophysics},
We have obtained new resolved images of the well-studied HR 4796A dust ring at 18 and 25 μm with the 8-m Gemini telescopes. These images confirm the previously observed spatial extent seen in mid-IR, near-IR, and optical images of the source. We detect brightness and temperature asymmetries such that dust on the NE side is both brighter and warmer than dust in the SW. We show that models of so-called pericenter glow account for these asymmetries, thus both confirming and extending our previous… Expand

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